To masturbate with such a tight grip on one's penis that it is denied the oxygen it requires to function properly. Much like in a cartoon, the head turns blue over time. A two-handed grip is used, and it is an extrememely intense action to observe.

1.) If you don't shut up, I'm going to strangulate you with a wire hanger.
2.) I ran my neck into the clothesline, and it felt like I was being strangulated.
3.) The girl who had an asthma attack was suffering from severe strangulation.